Body Slam is an attack used by Bombette in Paper Mario and Flurrie in Paper Mario: The Thousand-Year Door. Bombette's attack is used by holding down A until a meter is filled, and Flurrie's is used by keeping a cursor within a target radius. The attack does 3 damage in both games and costs 0 FP.
Bombette using Body Slam on a Goomba.
Flurrie using Body Slam on a Magikoopa.